One of the four Galilean moons of Jupiter, so called because of being discovered by Galileo. The most volcanically active object in the Solar system.
Hey, look in my telescope: you can see Io, Europa, Ganymede, and Callisto.
by antinous February 02, 2004
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One of the most creative people you'll meet. They are a smart dumbass usually meaning school smart/booksmart but irl a chaotic dumbass or vice versa and oftentimes, will kick somebodies ass or blackmail/embarrass someone who wrongs them.
Person 1: Damn, not only are they hot, but they're creative.
Person 2: Well yeah.. Their name is Io.

P1: annnddd they're being a dumbass again.
P2: toldja.. totallll io.
by riot ghouls rule May 22, 2021
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Io is unfathomably large; it is said the largest dragon who ever lived is smaller than a single one of his scales, which are blue, gold, brass, or red, and edged with silver and dark purple. He can, and does, appear as any age or breed of dragon, however.
Mostly used to replace other gods as if to avoid being offensive

Person A: Hey dude, did you finish your homework last night?
Person B: Oh for the love of Io, I forgot.
by nappadarappa December 08, 2010
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Piece of garbage that no one likes. Everywhere they walk curses the earth and the people around them. They deserve nothing, people lending them a hand and yet they’re still terrible to them.
Wow you’re such an Io
by Itchyrii September 27, 2020
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.io is the thing after a series of online games that is very popular
Agar.io lets play. Slither.io lets play that. Nope splix.io. and others
by Deltablue March 24, 2017
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The mobile operating system for Apple mobile products. Android and iOS are direct rivals. Personally, I believe Android is better for more advanced users, and iOS is for users who want a more simpleminded experience.
iOS is developed and maintained by Apple. It was created by Steve Jobs.
by Bhamilton0347 November 15, 2014
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Kimmie nicknamed herself IO after falling for Ben's crap for time one hundred. I hate to agree but he sure doesn't seem to care much about her feelings.
by Shyantha December 20, 2006
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